单选题 The following is a dialogue for students to practice. Can you distinguish which phoneme is the teacher guiding students to practice? A: What' s the matter with you? B: I had a bad day. A: What happened? B: I left my bag in the taxi.
【正确答案】 C
【答案解析】解析：考查语音教学的内容。根据所给对话练习，再根据语音教学的针对性原则可知，此对话中的单词大部分都含有[ae]音，所以此对话的目的是在练习[ae]音，故C项正确。